No, Oblivion is way huger than San Andreas. In San Andreas you never actually push 60, it just says you do. Also, it's not 3 x 3 it's like 1 x9 at some part, and widens out to 3x3 at some parts, etcetera. There are still 5 more square miles included in Oblivion.
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A man once asked the Buddha, "How does one escape the heat of the summer sun?"
And the Buddha replied, "Why not try crawling into the blazing furnace?"